Metal frame for screens



Dec. 5, 1933. F. JULIEN 1,938,429

METAL FRAME FOR SCREENS Original Filed April 15, 1931 5 F /3 INVENTOR. x10w; F (/04 //v .ul' BY 7 7 ATTORNEY.

latented Dec. 5, 1933 p 1,938,429.- METAL FRAME FOR SCREENS Louis F.Julian, Detroit, Mich, assignor to Chamberlin Metal Weather StripCompany, Detroit, Mich, a corporationof Michigan Original applicationApril 15, 1931, Serial No. 530,331, Divided and this application June24, 1932. Serial 619,031

4 Claims. (01. 156-14) This invention relates to steelor iron frames forwindow screens and the like and is a division of my application SerialNo. 530,331, filed April 15, 1931.-

The object of the invention is to provide a screen frame having a grooveto receive a screen retaining strip or rod, the frame being originallyso formed as to permit welding at the corners without the groove for therod becoming filled with the melted iron and flux.

Heretofore, in the attempt to m'annf cture creen frames of iron or steelwith which the cross and side members are welded at the cornor, theextruded molten metal and iiuxlying in the groove is practicallyimpossible to remove even with a cutting tool without marringand/ordeforming the frame.

By my improved method of construction of the frame the weld at thecorner is confined to the portion thereof extending from the grooveoutwardly and, as is hereinafter more fully described, the extrudedmaterial is confined to that portion of the corner not occupied by thegroove. I A further feature and object of the invention is to provide asteel or iron frame provided with a groove produced by the forming rollsthus avoiding the expense of cutting the groove in the metal or" theframe subsequent to rolling the bar forming the same.

These and other objects and novel features of the invention arehereinafter more fully described and claimed, and the preferred form ofconstruction of a metal frame embodying my invention is shown in theaccompanying drawing in which- Fig. 1 is an elevation of one corner ofthe finished screen frame.

Fig. 2 is an elevation showing a portion of a cross and side member orstile of the frame showing its form prior to the welding operation.

Fig. 3 is a view illustrative of the two members subsequent to thewelding.

Fig. 4 is an elevation showing a grinding wheel applied to the weldedframe to remove the extruded metal.

Fig. 5 is an elevation showing a corner of the finished frame subsequentto the grinding operation.

Fig. 6 is a section taken on line 6-6 of Fig. 1 showing the bars, thescreen and the retaining rod therefor.

Fig. '7 is a cross section taken on line 7- of Fig. 3,

One of the principal features of theirwention is shown in Fig. 2. Themitered ends of the bars 1 and 2 are ofisetor stepped, the groovedportion thereof being oiiset as at 3 relative to the meeting line 4between the two nembers. Thus, the portions 4. of each of theramesoriginally are slightly longer than in the nished frame. Insecuring these parts together a flux is applied to the two contactingaces 4 and the bars are placed under preswii heated at the cornerswhereby the members and 2 are forced together until the surfaces3 at theend of the bars 1 and 2 come to contact as in Fig. 3.

The extruded. material illustrated diagrammatically at 5 lies over theside face and edges of the frame but the surface 3 of the two frames,which come to meeting relationship as shown in Fig. 3, having beenunprovided with a flux t Ha and notplaced under pressuredoes not cause 7ners of the frames are submitted to a grinding operation as by agrinding wheel indicated at 8. in Fig. 4 and the surfaces of the framesare ground to provide a surface in continuity with theoriginal surfaceof the bars resulting in the construction as shown in Fig. ,5 with noapparent ine between the bars as is indicated at 4 in Fig. 2; Thus thetrouble arising in previous methods of welding metal bars is avoided. inthat the extruded metal does not flow into the groove provided for theretaining rod for the screen.

The groove 6 may be formed in any approved manner and so shapedthat thethroat of the groove, as will be understood from Fig. '7, is slightlyless in width than the diameter of the rod 9 to be positioned thereinto.The rod is inserted over the edge of the screen 10 as will 1 beunderstood from Fig. .6 and, due to the form of the groove the rod isretained in place .by the spring of the metal which is comparativelythin between the bottom of the groove and theinner metal is sufficientlysoft for the purpose, is

slightly rolled inwardly by complementally formed rolls to form a point13 whose distance from the opposite side of the groove is less than thewidth thereof below the throat. By rolling the groove in the bar afterthe manner stated, considerable expense is avoided in comparison to thecutting of the groove.

The frame thus may be welded at the corners in a manner to avoidextrusion of metal into the groove of the frame thus making it possibleto provide an iron or steel framed screen for various uses particularlyfor windows of houses or other buildings. Previously, frames for thispurpose have been made of sheet metal but sheet metal frames areunsatisfactory in many respects and disintegrate from rust etc., whereaswith a solid her here shown which can be rust-proofed and lacquered, aframe is provided that is of great strength and will last as long as thebuilding without deterioration from natural causes. By rolling thegroove in ,the manner stated, the expense of manufacture is materiallyreduced over either a sheet metal frame or a solid metal frame in whicha groove may be formed by a cutting operation'as the bar when it comesfrom the rolls is complete and only requires to be cut in stepped format the ends to the desired length for use.

Having thus briefly described my invention, what I claim and desire tosecure by Letters Patent of the United States is l. A frame comprising aseries of metal bars joined at their end portions, said bars each havinga longitudinal groove adjacent the inner edge and opening through theends thereof, said bars being welded at the joined ends throughout asurface extending from the outer face of the base toward and terminatingshort of the grooves thus providing an unwelded portion of greater widththan the groove.

2. A screen frame comprising metal bars mitered at the ends to form aframe of the desired shape, said bars each having a longitudinal grooveadjacent the inner edge of the assembled bars and extending through themitered ends to register with the grooves of the adjacent bars, saidbars at the miter being welded for a portion of the joined ends to leavean unwelded portion at the joined ends of the grooves.

3. A frame comprising a series of metal bars, the ends of which are cutat an angle of fortyfive degrees to the longitudinal edge portionsthereof, each of said bars having a longitudinal groove adjacent theinner edge and opening through each end thereof and in registration withthe grooves of the bars joined thereto, said bars being welded togetherat the joined ends from the outer edge toward the inner edge terminatingshort of the grooves thereby providing an unwelded end surface at thecontacting end surfaces each side of the grooves, and a metal screenfabric having its respective edges secured in said grooves.

4. A screen frame comprising a series of metal bars having the endsmitered and Welded together for a portion of the joint extendinginwardly from, the outer edge, said bars having a longitudinal grooveopening through the ends, a metal screen fabric extending across theframes having the edges thereof extending into the grooves of the bars,and a metal rod forced into the groove of each bar to bind therespective screen edges therein and thereby placing the unweldedportions of the joints under tension and tending to hold the screenfabric taut.

LOUIS F. JULIEN.

